SOLUTION: y=2x=4 x-4y=-7 solve each linear equations if possible.

Question 19498: y=2x=4
x-4y=-7
solve each linear equations if possible.
Answer by MelanieBCC(40) (Show Source): You can put this solution on YOUR website!
On your first equation there are 2 equal signs. I'm going to solve this as if it is . I'll do this step by step so that you can apply the information if the equation is supposed to be something else.
There are 2 methods to solve a system of linear equations, substitution and elimination. For this system, substitution is easiest, because we know that y equals 2x-4. Since this information came from the first equation, we use it in the second by substituting all y values in the second equation with 2x-4 to get:
and then solving for x
becomes which becomes which becomes
Go back to the first equation and substitute for all values of x. This gives you which becomes
I hope this helps!

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